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Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
352 AM CDT Sun Aug 9 2020

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-100900-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
352 AM CDT Sun Aug 9 2020 /452 AM EDT Sun Aug 9 2020/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk...with an associated:
     Limited damaging wind risk...up to 60 mph.
  Limited Excessive Heat Risk.

DISCUSSION...

An increasingly humid air mass combined with temperatures in the
upper 80s to low 90s will produce afternoon heat index values in
the upper 90s to locally 100 degrees this afternoon.

There are multiple chances of thunderstorms through tonight. The
first will be focused across primarily north-central Illinois late
this afternoon into this evening. The second will be across the
entire area late tonight through daybreak Monday. Strong gusty
winds will be possible with any of these thunderstorms.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
  Limited Severe Thunderstorm Risk.
  Limited Excessive Heat Risk south.
Tuesday through Saturday...
  Limited Thunderstorm Risk, mainly south.

DISCUSSION:

Warm and humid conditions with heat index values in the mid to
upper 90s are expected again on Monday afternoon primarily south
of I-80. In this area, additional strong to potentially severe
thunderstorms with gusty winds are possible in the afternoon and
evening.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 mph.

$$

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
352 AM CDT Sun Aug 9 2020

LMZ740>745-100900-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
352 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk tonight...with an associated:
     Limited thunderstorm wind gust risk...up to 40 knots.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
  Limited Severe Thunderstorm Risk.
Wednesday through Saturday...
  Limited Thunderstorm Risk.

$$

Kluber

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Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
406 AM CDT Sun Aug 9 2020

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-101000-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
406 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

Hot and humid conditions will increase today, with heat index
levels this afternoon and early evening ranging from 95 to 100.
Some spots may exceed 100 heat index this afternoon, and a heat
advisory may be required. In any case, those outside working
should plan on frequent breaks and make sure to drink plenty of
water.

The Storm Prediction Center is forecasting a Slight risk for
severe storms in areas north of Interstate 80 through tonight,
and a marginal risk farther south. While a warm layer of air above
the ground may prevent storms from forming today and tonight,
there is a chance that storms over Minnesota build south towards
the area this afternoon and evening. If that happens, then these
storms will bring the threat of damaging winds and heavy rainfall.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

There will be a chance for more thunderstorms on Monday and
Monday evening. Strong to severe thunderstorms will be possible
with damaging wind and large hail the primary threats. Locally
heavy rainfall and flash flooding in areas that experience
repeated thunderstorms will also be a concern. The Storm
Prediction Center has a marginal risk of severe thunderstorms
across most of the Outlook Area for Monday.

There will be periodic chances for thunderstorms from Tuesday
night through Friday, but severe weather potential appears low at
this time.

Very warm and humid conditions will continue on Monday with heat
index readings ranging from the mid 90s to near 100 degrees.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon and tonight.

$$

Ervin/12

Hazardous Weather Outlook
National Weather Service Indianapolis IN
458 AM EDT Sun Aug 9 2020

INZ030-031-035>049-051>057-060>065-067>072-100900-
Clinton-Howard-Fountain-Montgomery-Boone-Tipton-Hamilton-Madison-
Delaware-Randolph-Vermillion-Parke-Putnam-Hendricks-Marion-Hancock-
Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-Rush-Sullivan-Greene-
Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-Martin-Lawrence-
Jackson-Jennings-
Including the cities of Frankfort, Kokomo, Attica, Covington,
Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers,
Carmel, Noblesville, Anderson, Muncie, Winchester, Clinton, Newport,
Rockville, Greencastle, Plainfield, Brownsburg, Danville,
Indianapolis, Greenfield, Cumberland, New Castle, Terre Haute,
Brazil, Clay City, Spencer, Martinsville, Mooresville, Greenwood,
Franklin, Shelbyville, Rushville, Sullivan, Linton, Bloomfield,
Bloomington, Nashville, Columbus, Greensburg, Vincennes, Washington,
Loogootee, Shoals, Bedford, Mitchell, Seymour, Brownstown,
and North Vernon
458 AM EDT Sun Aug 9 2020

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Thunderstorms.

Hazards: Lightning, gusty winds, brief heavy rain.

Timing: Mainly southwest through this afternoon, then overspreading
northeastward across all of central Indiana this evening through
tonight.

Discussion: A cluster of storms over Missouri is expected to move
into southwest portions of central Indiana today. Shower and
thunderstorm chances will increase further tonight as a cold front
approaches from the northwest.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Outlook: There are chances for thunderstorms for all or parts of the
area from Monday through Saturday. Severe storms are not expected at
this time. Lightning and heavy rain are threats from any
thunderstorm.

Heat indices will be between 95 to 100 degrees on Monday.

Discussion: A front will move into and then remain in the area next
week, bringing chances for showers and thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

$$

Hazardous Weather Outlook
National Weather Service Indianapolis IN
458 AM EDT Sun Aug 9 2020

INZ021-028-029-100900-
Carroll-Warren-Tippecanoe-
Including the cities of Delphi, Flora, Williamsport, West Lebanon,
Lafayette, and West Lafayette
458 AM EDT Sun Aug 9 2020

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Thunderstorms.

Hazards: Lightning, gusty winds, brief heavy rain.

Timing:  This evening through tonight.

Discussion: Today will be sunny and dry, but shower and thunderstorm
chances will increase this evening through tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Outlook: There are chances for thunderstorms for all or parts of the
area from Monday through Saturday. Some of the storms could be
strong on Monday. Lightning is a threat from any thunderstorm.

Heat indices will be between 95 to 100 degrees on Monday.

Discussion: A front will move into and then remain in the area next
week, bringing chances for showers and thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

$$

Hazardous Weather Outlook
National Weather Service Lincoln IL
357 AM CDT Sun Aug 9 2020

ILZ027>031-036-037-100900-
Fulton-Knox-Marshall-Peoria-Stark-Tazewell-Woodford-
357 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for portions of central
Illinois and west central Illinois.

.DAY ONE...TODAY AND TONIGHT...

The heat index is expected to reach into the 95 to 100 degree
range on Sunday, west of Peoria.

Scattered thunderstorms are possible tonight. A few of the storms
may produce damaging wind gusts, hail, and heavy downpours,
especially after midnight.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

Scattered thunderstorms are expected Monday afternoon through
Saturday. A few of the storms may produce damaging wind gusts,
hail and heavy downpours Monday afternoon into the night.

The heat index is expected to reach into the 95 to 100 degree
range on Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed tonight, mainly after midnight.

$$

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
350 AM CDT Sun Aug 9 2020

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-100900-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and North of a line from Charlevoix MI to South
Fox Island 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
350 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for the open waters of Lake
Michigan.

.DAY ONE...Today and Tonight

Chances for thunderstorms are forecast tonight. There is
uncertainty with the timing and coverage of storms across the
lake during this period.

If storms can develop and move across the lake, strong to severe
storms are possible. Large hail to one inch in diameter, damaging
winds to 50 knots and frequent cloud to ground lightning are
possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for thunderstorms linger into Monday, as a cold front
moves southeast through the region. There is uncertainty again
with the coverage of storms across the lake Monday.

If storms can develop, a few strong to severe storms are
possible, mainly over the southern half of the lake. Large hail
to one inch in diameter, damaging winds to 50 knots, and frequent
cloud to ground lightning are possible.

There are mainly small chances for thunderstorms at times
Wednesday through Saturday.

$$
Wood
www.weather.gov/mkx

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
350 AM CDT Sun Aug 9 2020

LMZ643>646-100900-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
350 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.

.DAY ONE...Today and Tonight

Chances for thunderstorms are forecast tonight. There is
uncertainty with the timing and coverage of storms across the area
during this period.

If storms can develop and move into the area, strong to severe
storms are possible. Large hail to one inch in diameter, damaging
winds to 50 knots and frequent cloud to ground lightning are
possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for thunderstorms linger into Monday, as a cold front
moves southeast through the region. There is uncertainty again
with the coverage of storms across the area Monday.

If storms can develop, a few strong to severe storms are
possible, mainly south of North Point Lighthouse. Large hail to
one inch in diameter, damaging winds to 50 knots, and frequent
cloud to ground lightning are possible.

There are mainly small chances for thunderstorms at times
Wednesday through Saturday.

$$

Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
350 AM CDT Sun Aug 9 2020

WIZ046-047-051-052-056>060-062>072-100900-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
350 AM CDT Sun Aug 9 2020

This Hazardous Weather Outlook is for portions of east
central Wisconsin, south central Wisconsin and southeast Wisconsin.

.DAY ONE...Today and Tonight

Chances for thunderstorms are forecast later this afternoon into
tonight. There is uncertainty with the timing and coverage of
storms across the area during this period.

If storms can develop and move into the area, strong to severe
storms are possible. Large hail to one inch in diameter, damaging
winds to 60 MPH, locally heavy rainfall and frequent cloud to
ground lightning are possible.

Heat index values will be in the middle 90s today.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Chances for thunderstorms linger into Monday, as a cold front
moves southeast through the region. There is uncertainty again
with the coverage of storms across the area Monday.

If storms can develop, a few strong to severe storms are
possible, mainly along and south of a Mineral Point, to Madison,
to Milwaukee line. Large hail to one inch in diameter, damaging
winds to 60 MPH, and frequent cloud to ground lightning are
possible.

Heat index values may reach the middle 90s on Monday in
southeastern parts of the area.

There are mainly small chances for thunderstorms at times
Wednesday through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times this afternoon into
Monday.

$$

Hazardous Weather Outlook
National Weather Service Grand Rapids MI
352 AM EDT Sun Aug 9 2020

MIZ037>040-043>046-050>052-056>059-064>067-071>074-100800-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
352 AM EDT Sun Aug 9 2020

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

While an isolated thunderstorm is possible anywhere this afternoon
the greatest risk of more widespread thunderstorms is during the
early morning hours of Monday. That would be mostly west of US-131
and there is a risk of gusty winds as the storms move on shore.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

There is the on-going threat of thunderstorms into the mid morning
hours of Monday from the overnight storms. However the greater
threat is the storms ahead of the cold front that will come
through this area during the early morning hours of Tuesday. Gusty
winds and locally heavy rain would be the greatest threats from
these storm.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

Hazardous Weather Outlook
National Weather Service Grand Rapids MI
352 AM EDT Sun Aug 9 2020

LMZ844>849-100800-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
352 AM EDT Sun Aug 9 2020

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Today and Tonight

An area of thunderstorms is expected to cross Lake Michigan around
midnight Monday morning. Those storms may have gusty winds and
large waves associated with them as they cross the near shore
water prior to daybreak.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Additional thunderstorms are possible early Tuesday morning ahead
of the cold front. These storms may have gusty winds and large
waves with them. Very low visibility`s should be expected in
intense rain from these storms.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

$$

wdm

Hazardous Weather Outlook
National Weather Service Northern Indiana
351 AM EDT Sun Aug 9 2020

INZ003>009-012-014-016>018-LMZ043-046-MIZ077>081-OHZ001-002-004-005-
015-100800-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Marshall-Kosciusko-Whitley-Allen IN-New Buffalo MI to St Joseph MI-
Michigan City IN to New Buffalo MI-Berrien-Cass MI-St. Joseph MI-
Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-Paulding-
351 AM EDT Sun Aug 9 2020 /251 AM CDT Sun Aug 9 2020/

This Hazardous Weather Outlook is for northern Indiana, southwest
Michigan, northwest Ohio and the nearshore waters of southeastern
Lake Michigan.

.DAY ONE...Today and tonight.

There is a chance for thunderstorms late tonight across northwest
Indiana and southwest Michigan. Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a chance for thunderstorms Monday into Monday night, best
chances Monday night as a cold front moves through. There is a low
risk for an isolated strong to severe storm late Monday afternoon
into Monday evening across northwest Indiana and southwest Michigan.

There are additional chances for showers and thunderstorms Thursday
through Saturday, mainly during the afternoon and early evening
hours.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

$$

Hazardous Weather Outlook
National Weather Service Northern Indiana
351 AM EDT Sun Aug 9 2020

INZ013-015-020-022>027-032>034-OHZ016-024-025-100800-
Pulaski-Fulton IN-White-Cass IN-Miami-Wabash-Huntington-Wells-Adams-
Grant-Blackford-Jay-Putnam-Van Wert-Allen OH-
351 AM EDT Sun Aug 9 2020

This Hazardous Weather Outlook is for northern Indiana and
northwest Ohio.

.DAY ONE...Today and tonight.

There is a chance for thunderstorms late tonight across northwest
Indiana. Severe storms are not expected.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There are periodic chances for thunderstorms Monday through Saturday,
with the highest probability during the afternoon and early evening
hours.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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